JPS56143452A - Two-color electrophotographic copying method - Google Patents

Two-color electrophotographic copying method

Info

Publication number
JPS56143452A
JPS56143452A JP4731180A JP4731180A JPS56143452A JP S56143452 A JPS56143452 A JP S56143452A JP 4731180 A JP4731180 A JP 4731180A JP 4731180 A JP4731180 A JP 4731180A JP S56143452 A JPS56143452 A JP S56143452A
Authority
JP
Japan
Prior art keywords
knob
resistance
color image
density ratio
chargers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4731180A
Other languages
Japanese (ja)
Inventor
Shuichi Karasawa
Fuyuhiko Matsumoto
Shuichi Tsushima
Motoichiro Inoue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP4731180A priority Critical patent/JPS56143452A/en
Publication of JPS56143452A publication Critical patent/JPS56143452A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0105—Details of unit

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To operate control of density ratio of each color image only with a knob on a panel, by rendering applied discharge voltage or discharge current in at least one of corona chargers for reversely charging photoconductive layers variable. CONSTITUTION:Photoreceptor 1 is formed like a drum, rotatable in the arrow direction, and provided with chargers 2, 3, filter 4, optical exposure system 5, developing devices 6, 7, etc. arranged around its circumference. In such a structure, high-voltage power supply 15 for applying discharge voltage to charger 3 for secondary charging is provided with external variable resistance R. A resistance value of resistance R can be changed only by operation of a knob on an operation panel, permitting density ratio of each color image in copying to be continuously changed.
JP4731180A 1980-04-10 1980-04-10 Two-color electrophotographic copying method Pending JPS56143452A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4731180A JPS56143452A (en) 1980-04-10 1980-04-10 Two-color electrophotographic copying method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4731180A JPS56143452A (en) 1980-04-10 1980-04-10 Two-color electrophotographic copying method

Publications (1)

Publication Number Publication Date
JPS56143452A true JPS56143452A (en) 1981-11-09

Family

ID=12771741

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4731180A Pending JPS56143452A (en) 1980-04-10 1980-04-10 Two-color electrophotographic copying method

Country Status (1)

Country Link
JP (1) JPS56143452A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51123160A (en) * 1975-04-21 1976-10-27 Hitachi Ltd Electronic photograph device
JPS54147040A (en) * 1978-05-10 1979-11-16 Ricoh Co Ltd Two color electrophotographic method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51123160A (en) * 1975-04-21 1976-10-27 Hitachi Ltd Electronic photograph device
JPS54147040A (en) * 1978-05-10 1979-11-16 Ricoh Co Ltd Two color electrophotographic method

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